Formula For Physics Flashcards
(43 cards)
Velocity
Velocity=speed/time
What is acceleration
Rate of change in velocity
Equation for acceleration
Acceleration= change in velocity/time
What is acceleration measured
M/s2= metres per second/seconds
2nd formula for acceleration
2as= v2-u2
Gradient of distance/time graph shows?
The speed the object is travelling
What does the gradient of velocity time graph show
The acceleration or decelration of an object
On velocity of time graph how to find the distance
Area underneath the curve
What is a force
A force is a push or that acts upon an o as a result of that object’s interactions with its surroundings.
What is forced measured in and it sclar/vector
It is measured in newtons, and has both magnitude and direction
Contacts force and non contact force
Contact force can be only exerted when objects physically touch
Whats newton first law
A resultant force is required to change the motion of an object
Whats newton first law
A resultant force is required to change the motion of an object
Newton second law
A resultant force will cause an object to accelerate in the direction of the force.
What is the equation for force
Force=mass x acceleration
Bearings
A ‘bearing’ is an angle measured clockwise from the north direction.
For example, in the image above, the vector (the dark blue arrow) is at a bearing of 140°, because it’s 140° clockwise from north.
Formula for weight
Weight= mass x gravity
2 factors that dtermine the strength of gravitational force of attraction
Distance between objects
The mass of objects
Formuala for gravitational potential energy
Gravitational potential emergy=mass x gravity x height
Key points to understand objects undergoing circukar motioj
Key points to understand for objects undergoing circular motion:
The objects changes direction continuously, which changes it’s velocity
This change in velocity means the object accelerates
The acceleration is caused by a centripetal force acting inward
What is centripetal force dependent on and how
Mass:
Increasing the mass would increase the centripetal force required to keep the object travelling at the same speed with the same radius.
Speed:
Increasing the speed would increase the centripetal force required to keep the object travelling with the same radius and mass.
Orbital radius:
Increasing the radius of orbit would decrease the centripetal force required to keep the object travelling at the same speed.
Newtons third law
When two obejcts interact they are equal and opposite
Mometum formula and units
Momentum=mass x velocity
Kg m/s
P=mv
The conservation of momentum principle states:
The total momentum before the collision is equal to total momentum after the collision
